fix lintian issues

Author: fblackburn1

debian/control

@@ -1,6 +1,6 @@
 Source: wazo-plugind
 Section: python
-Priority: extra
+Priority: optional
 Maintainer: Wazo Maintainers <dev+pkg@wazo.community>
 Build-Depends: debhelper (>= 12), dh-python, python3-all, python3-setuptools
 Standards-Version: 3.9.6

debian/wazo-plugind.lintian-overrides

@@ -1,4 +1,4 @@
-wazo-plugind: script-not-executable usr/lib/wazo-plugind/templates/postinst.jinja
-wazo-plugind: script-not-executable usr/lib/wazo-plugind/templates/postrm.jinja
-wazo-plugind: script-not-executable usr/lib/wazo-plugind/templates/prerm.jinja
-wazo-plugind: shell-script-fails-syntax-check usr/lib/wazo-plugind/templates/postrm.jinja
+wazo-plugind: script-not-executable [usr/lib/wazo-plugind/templates/postinst.jinja]
+wazo-plugind: script-not-executable [usr/lib/wazo-plugind/templates/postrm.jinja]
+wazo-plugind: script-not-executable [usr/lib/wazo-plugind/templates/prerm.jinja]
+wazo-plugind: shell-script-fails-syntax-check [usr/lib/wazo-plugind/templates/postrm.jinja]